все ок

WebApplication1/ConsoleApp1/ConsoleApp1.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

WebApplication1/ConsoleApp1/Program.cs

@@ -0,0 +1,2 @@
+// See https://aka.ms/new-console-template for more information
+Console.WriteLine("Hello, World!");

WebApplication1/WebApplication1.sln

@@ -5,6 +5,13 @@ VisualStudioVersion = 17.11.35327.3
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WebApplication1", "WebApplication1\WebApplication1.csproj", "{7E520075-F0D5-4709-B5DE-B733D7AFF32F}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Элементы решения", "Элементы решения", "{7C3280C9-A734-4A42-B84C-1291DDD5A894}"
+	ProjectSection(SolutionItems) = preProject
+		TextFile1.txt = TextFile1.txt
+	EndProjectSection
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConsoleApp1", "ConsoleApp1\ConsoleApp1.csproj", "{B9BBEA89-CB1C-46EC-812C-BE7E2DED12BE}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +22,10 @@ Global
 		{7E520075-F0D5-4709-B5DE-B733D7AFF32F}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{7E520075-F0D5-4709-B5DE-B733D7AFF32F}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{7E520075-F0D5-4709-B5DE-B733D7AFF32F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B9BBEA89-CB1C-46EC-812C-BE7E2DED12BE}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B9BBEA89-CB1C-46EC-812C-BE7E2DED12BE}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B9BBEA89-CB1C-46EC-812C-BE7E2DED12BE}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B9BBEA89-CB1C-46EC-812C-BE7E2DED12BE}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE